code: def test_infer_objects(idx):
      with pytest.raises(NotImplementedError, match="to_frame"):
          idx.infer_objects()
  
file_path: pandas/pandas/tests/indexes/multi/test_analytics.py
imports: import numpy
  import pytest
  import pandas
  from pandas import Index, MultiIndex, date_range, period_range
  import pandas._testing
label_desc: Use image node_id 1 for calling a global function with example usage: test_infer_objects(idx) without return types